The word marsh has more than one meaning:

• Marsh is a type of wetland.
• Places called Marsh in England:
  • Marsh, Buckinghamshire
  • Marsh, Somerset
  • Marsh Baldon , Oxfordshire
  • Marsh Gibbon, Buckinghamshire
  • Marsh Green, Devon
  • Marsh Green, Kent
  • Marsh Green, Tyne & Wear
  • Marsh Lane, Derbyshire
  • Marsh Lane, Gloucestershire

• Marsh is a supermarket chain based in Indiana, USA.
• Marsh & McLennan Companies is a US-based global professional services firm.
• Othniel Charles Marsh was a US paleontologist.